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低含量百菌清原药的提纯
The Purification of Poor Chlorothalonil
【摘要】 低含量百菌清原药先经热水洗涤除去酸性物质和大部分的间苯二腈, 干燥后再用甲苯进行重结晶, 可获外观灰白色的百菌清原药。其百菌清含量≥95 % 、间苯二腈含量≤01 % 、收率≥66 % 、甲苯回收率≥86 % 。
【Abstract】 A method for purification of poor chlorothalonil has been developed, that is washed by hot water to remove acidic compounds and the greater part of m phthalic nitrile, and then dried and recrystallized. The gray white poduct can be obtained with contents of chlorothalonil more than 95% and m phthalic nitrile less than 0.1%. The recoveries of m phthalic nitrile and toluol were more than 66% and 86%, respectively.
- 【文献出处】 湖南化工 ,HUNAN CHEMICAL INDUSTRY , 编辑部邮箱 ,1999年04期
- 【分类号】TQ455.4r#
- 【下载频次】90